Limestone Dissolution in Converter Slag at 1873 K (1600 degrees C)

作者：Deng Tengfei^*; Nortier Patrice; Ek Mattias; Du Sichen

来源：Metallurgical and Materials Transactions B-Process Metallurgy and Materials Processing Science, 2013, 44(1): 98-105.

DOI：10.1007/s11663-012-9761-0

• Argon atmospheres
• Converter process
• Converter slags
• Decomposition process
• Decomposition products
• Dense structures
• Limestone dissolution

Decomposition and dissolution of limestone in slag at 1873 K (1600 A degrees C) were studied. The limestone samples were in the shape of cubes (11 mm x 11 mm x 11 mm approximately). The decomposition was carried out both in argon and in slag under argon atmosphere. In order to gain an insight into the phenomenon of slow decomposition, the decomposition process of CaCO3 was simulated using Comsol. The results showed evidently that the decomposition of calcium carbonate was controlled mostly by heat transfer. It was also found that the decomposition product CaO had very dense structure, whether the sample was decomposed in slag or in argon. The slow decomposition and the dense CaO layer would greatly hinder the dissolution of lime in the slag. The present results clearly indicate that the addition of limestone instead of lime would not be beneficial in the converter process.

• 出版日期2013-2
• 单位Royal Institute of Technology